15% is the change from 420 to 483
Calculation steps:
[( 483 - 420 ) ÷ 420] x 100 = 15%
Formula
Percentage change = [(483 - 420) / 420] x 100
Subtract the new number by the original number
483 - 420 = 63
63 ÷ 420 = 0.15
0.15 x 100 = 15%
Example